This is the Genuine BMW M Performance Exhaust Muffler for the BMW G20 M340i(x) and G22 M440i(x) with the B58D engine.
Not only the acoustics has been optimized in the exhaust system to enhance the sound quality and volume for the typical BMW character. The back pressure is also reduced to Improve exhaust flow which increases your engine's performance capacity. The long-distance comfort is also maintained. You can expect an excellent, distinctive sound for both interior and exterior. All parts are manufactured using the highest quality stainless steel for high durability and corrosion resistance. Developed with the latest CAD and FEM Technologies for optimal fit and OEM quality.